Solve the following problems using node networks and the CPM critical path method.

1.The project manager of a software company wants you to help him manage a new project by preparing the project network. Once you have ready the network that you calculate for each activity, early and late times, determine the clearances, identify the critical path and the time to finish the project. The following information is collected for the project and you are asked to use the Critical Path Method to solve it (CPM).

ID	ACTIVITY	Predecessor	Time
A	External specifications	None	8
B	Review design features	A	2
C	Document the new features	A	3
D	Compose software	A	60
E	Schedule and check	B	60
F	Edit and post notes	C	2
G	Review manual	D	2
H	Alpha site	E,F	20
I	Print Manual	G	10
J	Beta site	H,I	10
K	Manufacture	J	12
L	Release and ship	K	3